我用的是pentaho 8.1 ce
当我在pentaho spoon中使用超过1个cassandra输入时，大多数情况下（4次中有3次），我们会得到以下错误：

java.lang.NoClassDefFoundError: io/netty/util/internal/TypeParameterMatcher
2019/02/22 14:46:53 - Get cancel tickets.0 -    at java.lang.Class.forName0(Native Method)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at java.lang.Class.forName(Class.java:348)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at io.netty.util.internal.JavassistTypeParameterMatcherGenerator.generate(JavassistTypeParameterMatcherGenerator.java:62)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at io.netty.util.internal.JavassistTypeParameterMatcherGenerator.generate(JavassistTypeParameterMatcherGenerator.java:54)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at io.netty.util.internal.TypeParameterMatcher.get(TypeParameterMatcher.java:42)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at io.netty.util.internal.TypeParameterMatcher.find(TypeParameterMatcher.java:78)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at io.netty.channel.SimpleChannelInboundHandler.<init>(SimpleChannelInboundHandler.java:67)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at io.netty.channel.SimpleChannelInboundHandler.<init>(SimpleChannelInboundHandler.java:57)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.Connection$Dispatcher.<init>(Connection.java:1017)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.Connection.<init>(Connection.java:116)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.Connection.<init>(Connection.java:128)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.Connection$Factory.open(Connection.java:806)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.ControlConnection.tryConnect(ControlConnection.java:252)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:201)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:79)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.Cluster$Manager.negotiateProtocolVersionAndConnect(Cluster.java:1619)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1537)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at com.datastax.driver.core.Cluster.getMetadata(Cluster.java:399)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at org.pentaho.cassandra.driver.datastax.DriverConnection.getKeyspace(DriverConnection.java:152)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at org.pentaho.di.trans.steps.cassandrainput.CassandraInput.processRow(CassandraInput.java:156)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at org.pentaho.di.trans.step.RunThread.run(RunThread.java:62)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at java.lang.Thread.run(Thread.java:748)
2019/02/22 14:46:53 - Get cancel tickets.0 - Caused by: java.lang.ClassNotFoundException: io.netty.util.internal.TypeParameterMatcher
2019/02/22 14:46:53 - Get cancel tickets.0 -    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
2019/02/22 14:46:53 - Get cancel tickets.0 -    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
2019/02/22 14:46:53 - Get cancel tickets.0 -    ... 22 more

有人遇到过这样的事吗？我们将在包括windows和mac平台在内的几个工作站上实现这一点。